<template>
  <div class="son">
    我是son子组件---{{ toSonMoney }}-----{{ sonName }}----{{ arr }}
    <button @click="btnClick">想花点钱</button>
  </div>
</template>
<script>
export default {
  props: ['toSonMoney', 'sonName', 'arr'],
  methods: {
    btnClick () {
      //   this.toSonMoney = this.toSonMoney - 50
    }
  }
}
</script>
<style>
.son {
  width: 300px;
  height: 300px;
  border: 2px solid red;
}
</style>
